<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>
<body>
<div id="demo1">{{mess}}</div>
<script >
  new Vue ({
    el:"#demo1",        //接管区域
    data:{              //数据
    mess:"hello world"
    },
  })
</script>
</body>
</html>
